Mobile, rock drill supporting rig

ABSTRACT

The drill rig comprises a mobile chassis, rock drill supporting means mounted on the chassis, hydraulic jacks attached to the chassis for setting up the rig in a work position, an operator&#39;&#39;s platform resting upon the chassis in a transport position by means of cooperating support means and lift and support means attached to the platform for separating the platform from the chassis into a work position in which the vibrations in the chassis, caused by the rock drill or drills, are not transferred to the platform.

1116 516161; atent Skattman et a1.

[ MOBILE, ROCK DRILL SUPPORTING RIG Inventors: Rune Carl ValfridSkattman, 1, 96

Gubbangsvagen, Enskede; Olov Richard Bjiirk, 2, 7 Lasarettsvagen,Ektorp, both of Sweden [22] Filed: Mar. 17, 1971 [211 Appl. No.: 125,957

[] Foreign Application Priority Data Mar. 19, 1970 Sweden 3611 [52] US.Cl 254/45, 173/23, 173/28, 175/219, 280/611 [51] Int. Cl B66i 7/26, E21c11/02 [58] Field of Search 254/45, 86, 88, 89, 254/93, 49, 173/28, 23,171; 175/219, 180/89; 280/611, 325, 150.5; 248/15, 13; 212/ [56]References Cited UNITED STATES PATENTS 3,411,596 1l/l968 Robbins /85 1Jan. 8, 1974 3,586,189 6/1971 r6m1161m 254/47 3,289,868 12/1966 M11161et 61. 254/45 1,457,897 6/1923 136661161 212/145 3,255,906 6/1966 916161214/515 1,425,965 8/1922 l-locke 214/515 Primary Examiner0thell M.Simpson Assistant Examiner-Robert C. Watson Att0rneyMunson & Fiddler [57] ABSTRACT transferred to the platform.

11 Claims, 5 Drawing Figures PATENTED W974 3.784.159

SHEET 10F 3 Fig.2

RUNE CARL VALFRID SKATTWAIJ and OLOV RICHARD BJORK BY HUNSON & FIDDLERPATENTEDJAN 8I9H Fig.3

I NVE NTORS BY MUNSON & FIDDLER 1 MOBILE, ROCK DRILL SUPPORTING RIG Thisinvention relates to a mobile, rock drill supporting rig which comprisesan operators platform.

Previous drill rigs of this type are disadvantageous in that thevibrations, caused by the rock drill or drills during drilling, aretransferred to the platform and further to the operator being on theplatform. Those vibrations cause considerable physical strain ontheoperator and are particular serious in the case the rig is providedwith two or more rock drills.

The main object of the invention is to solve this problem by arrangingthe platform separable from the rig chassis, so that the platform can beisolated from the chassis during drilling.

An embodiment of the invention will hereinafter be described in detailwith references made to the accompanying drawings, wherein FIG. 1 is aside elevational view of a drill rig according to the invention set upin work position. FIG. 2 is an end elevational view of the rig inFIG. 1.FIG. 3 is a large scale cross section along line III-III in FIG. 1,wherein the platform is resting upon the rig chassis and the lifted upwork position of the platform is marked out with dotted lines. FIG. 4 isa cross section through the conical support means taken along the lineIV-IV of FIG. 3. FIG. 5 is a cross section similar to FIG. 4 showing aprismatic support means.

The mobile rig shown in FIG. 1 and 2 consists ofa rig chassis 2 providedwith wheels 1. On the chassis 2 there are mounted three rock drillsupporting feed bars 3, each provided with a rock drill 4. To establisha rigid set up of the drill rig in its working position, it is providedwith a number of downwardly extendible support legs 5 preferablyconsisting of hydraulic jacks. On the rig chassis 2 there is provided abox 6 within which all the main valves for the rock drill functions arearranged. According to the invention the drill rig comprises anoperators platform 7. On the platform there is mounted a control panel 8which supports a number of control valves. These valves are operable bymeans of levers 13 for manoeuvering of the rig and the rock drills.'Onthe platform there is also arranged a drill rod rack 14 and a protectiveroof 9.

The rig chassis and the operators platform 7 are provided withcooperating support means 10 and 11 by means of which the platform isarranged to rest upon the rig chassis in a transporting position.

To isolate the operators platform 7 from the rig chassis, which issubjected to considerable vibrations during drilling, the platform isprovided with downwardly extendible support legs 12 preferablyconsisting of hydraulic jacks. By means of these jacks the, platform canbe lifted up so that the support means 10 and 11 are separated and theplatform forms a free standing unit to which vibrations of the rigchassis will not be transmitted. In the described embodiment of theinvention the support legs consist of hydraulic pistoncylinder units.However, the invention is not limited thereto. Of course, the supportlegs may consist of other equivalent devices; for example mechanicalscrew operated jacks. In the described embodiment of the invention, thesupport legs of the rig chassis as well as the support legs of theplatform consist of hydraulic piston-cylinder devices which are alloperated from the control panel 8. In order not to make the figuresobscure, supply conduits to these hydraulic support legs are not shown.

As being apparent from FIG. 3 the support means 10 and I 1 are providedwith slanted prismatic'contact surfaces (see FIG. 5) which willcentralize the platform relative to the rig chassis as the former islowered. The contact surfaces may also be conical as shown in FIG. 4.Moreover, between the rig chassis and the platform there are providedwire straps 15 for limiting the lift movement of the platform above therig chassis. The height to which the platform is raised above the rigchassis should not exceed the ability of the support means 10 and 11 torestrict sidewise movement of the platform relative to the rig chassis.Should the platform be lifted up too high the bottom edge of the uppersupport means 10 may pass sidewise past the top edge of the lowersupport means 11 and bring them out of alignment. Thus, the supportmeans 10 and l 1 may not be able to cooperate as the platform islowered.

The invention is not limited to the described and shown embodiment butcan freely be varied within the scope of the claims.

What we claim is:

l. A supporting rig for a rock drill of the character describedcomprising:

a a chassis for supporting the rig in a working position;

b a platform for supporting the drill operator;

c means for supporting said chassis on the ground;

d separate means adapted for individually supporting said platform onthe ground; and being operable to raise the platform into an elevatedfree standing position.

e meansfor supporting said platform on said chassis in its loweredposition being effective to maintain the platform aligned with thechassis when the platform is raised to an elevated free standingposition;

2. A drill rig according to claim 1, characterized in that thesupporting means are provided with mating tapered contact surfaces.

3. A drill rig according to claim 1, characterized in that the separatesupporting means on the platform comprise pressure fluid actuatedpiston-cylinder devices.

4. A mobile rock drill supporting rig comprising a chassis supportingthe drill and an operators platform adapted to rest on said chassis saidoperators platform comprising means for raising the same above thechassis and to support it on the ground independently of the chassiswhen drilling.

5. Device according to claim 4 in which the means for raising theoperators platform comprise support legs adapted to be extended from theoperators platform into contact with the ground.

6. Device according to claim 5 in which said support legs comprisehydraulic power means.

7. Device according to claim 5 in which the operators' platform isprovided with additional support means having a contact surface slidablyengaging a seat member carried by said chassis.

8. Device according to claim 7 in which the support means of theplatform and the seat member of the chassis have mating tapered contactsurfaces and means being provided for restricting the distance betweenthe chassis and the operators platform in the raised position of thelatter so that transverse movement between said support means and saidseat member is limited by said contact surfaces.

3 4 9. Device according to claim 1 in which the means comprise hydraulicjack means. for supporting the platform on the chassis comprise ta- 11.Device according to claim 1, in which means are pered nested members.provided for limiting the distance of the elevated free 10. Deviceaccording to claim 1, in which the means standing position of theplatform. for individually supporting the platform on the ground 5UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent; No.3,784,159 Dated January 8, 197 4 Inventor(s) RUNE CARL VALFRIDSKAT'IP'IAN ET 'AL It is certified that error appears in theabove-identified patent and that said Letters Patent are herebyeorrected as shown below:

[30] Foreign Application Priority Data March 19, 1970SWEDEN..........j..3711/7O Signed and sealed this 9th day of July 1974.

(SEAL) Attest:

McCOY M. GIBSON, JR. C. MARSHALL DANN Attesting Officer I Commissionerof Patents FORM PC4050 uscoMM-Dc sows-P69 I I ".5. GOVERNMENT PRINTINGOFFICE I I953 356"334r

1. A supporting rig for a rock drill of the character describedcomprising: a a chassis for supporting the rig in a working position; ba platform for supporting the drill operator; c means for supportingsaid chassis on the ground; d separate means adapted for individuallysupporting said platform on the ground; and being operable to raise theplatform into an elevated free standing position. e means for supportingsaid platform on said chassis in its lowered position being effective tomaintain the platform aligned with the chassis when the platform israised to an elevated free standing position;
 2. A drill rig accordingto claim 1, characterized in that the supporting means are provided withmating tapered contact surfaces.
 3. A drill rig according to claim 1,characterized in that the separate supporting means on the platformcomprise pressure fluid actuated piston-cylinder devices.
 4. A mobilerock drill supporting rig comprising a chassis supporting the drill andan operator''s platform adapted to rest on said chassis said operator''splatform comprising means for raising the same above the chassis and tosupport it on the ground independently of the chassis when drilling. 5.Device according to claim 4 in which the means for raising theoperator''s platform comprise support legs adapted to be extended fromthe operator''s platform into contact with the ground.
 6. Deviceaccording to claim 5 in which said support legs comprise hydraulic powermeans.
 7. Device according to claim 5 in which the operator''s platformis provided with additional support means having a contact surfaceslidably engaging a seat member carried by said chassis.
 8. Deviceaccording to claim 7 in which the support means of the platform and theseat member of the chassis have mating tapered contact surfaces andmeans being provided for restricting the distance between the chassisand the operator''s platform in the raised position of the latter sothat transverse movement between said support means and said seat memberis limited by said contact surfaces.
 9. Device according to claim 1 inwhich the means for supporting the platform on the chasSis comprisetapered nested members.
 10. Device according to claim 1, in which themeans for individually supporting the platform on the ground comprisehydraulic jack means.
 11. Device according to claim 1, in which meansare provided for limiting the distance of the elevated free standingposition of the platform.